CORE INSERTION TYPE SPIRAL TUBE AND MAKING METHOD FOR THE SAME
A core insertion type spiral tube includes: a spiral metal tube having an empty space therein and an elastic core member positioned inside said spiral metal tube.
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Format: | Patent |
Sprache: | eng |
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Zusammenfassung: | A core insertion type spiral tube includes: a spiral metal tube having an empty space therein and an elastic core member positioned inside said spiral metal tube. |
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